Displacement mechanism



Fam EQ, W5@ J. MIKULASEK DISPLACEMENT MECHANISM Filed March 27, 1944 1N V EN TOR.

Patented Jan. 10, 1950 fr. n

UNITED STATE-s lPATENT'. oFFlcE;

DISPLACEMENT MECHANISM John Mikulasek, Bellevue, Iowa Application March 27, 1944., Serial No. 528,304 3 Claims. (Cl. 230-146 This invention relates to a fluid displacement device that may be put to numerous uses either as a suction pump or a pressure pump, such a device also being constructed to act as a motor by supplying a iiuid under pressure thereto.

The object of this invention is to provide a device of the class mentioned having a plurality of spiral blades in each set, thereby decreasing the radial distances between the adjacent convolutions of the blades for increasing the eiciency of the device.

All other features and advantages inherent in the iiuid displacement device presented shall hereinafter be referred to in the more detailed description of the device disclosed which carry out the principles of the present invention, reference being had to the accompanying drawings wherein the mechanical adaptations of the principles are illustrated. In the drawings:

Fig. 1 is a cross sectional view taken substantially upon the line I--l of Fig. 2 illustrating a construction involving this invention.

Fig. 2 is a vertical sectional view taken substantially along the line 2-2 of Fig. l.

In referring now to the drawing which illustrates a preferred form of this invention, there is shown a pump casing 4l) which consists of two sections 4| and 42, and openings for iiuid passage into and out of the displacement device provided as at 43 and 44. Stationary spiral blades tl, 62 Yand B3 are attached to casing section 42 and extend within the casing. Movable spiral blades 64, 65, and 56 are carried by a free disk 61 which extends in parallel relation to the casing section 42.

The disk 6'! with its attached blades is operated by eccentric mechanism; this is possible because of the shortness of the stroke which is made possible by the use of a plurality of three blades, a construction which decreases the radial distances between the adjacent convolutions of the blades. In the construction illustrated, the eccentric operating mechanism for oscillating the movable blades comprises three eccentrics E8, 69 and 1li, which are respectively carried by shafts 14, 15 and 16 journalled in the casing. The inner terminals of the movable blades are provided with bearing sleeves 1|, l2 and 13 respectively for encircling the eccentrics which it will be noted are located in the casing. Each of the shafts 14,

'I5 and 'I6 carries a counterbalanced gear 'l1 outside of the casing. A driving gear i8 which is secured to a shaft 19 meshes with the three gears 11. The inner end of the shaft 79 is journalled in the casing and counterbalancing members 8l]k TI-he construction is exceedingly simple and? eicient as it is well balanced and not likely to get out of proper balance during operation whereby the parts will always maintain a proper relationship.

There are numerous other adaptations of the principles of the present invention and those Which have been described and disclosed and those which have been so presented do fairly well represent such basic structures of this invention.

A pump of this type may be readily manufactured within reasonable tolerances in spite of the fact that involute curved blades are used, the

' main consideration in the construction of such blades being to maintain the radi-al distances between adjacent convolutions equal in distance to obtain the greatest eciency in the pump during performance. The thickness of the blades may be the same in each set, although the blades of one set may be made considerably thicker than the blades of the other set which may be desired under certain conditions of materials.

One of the other features of the present invention is that the structures hereinbefore described are all such that when the same are put to the use of driving some other unit as a motor that no dead center relationship exists at any time. In other words, the minute pressure is applied to the pump blades, preferably through the center opening thereof, the movable blades shall be set into motion immediately regardless of their position angularly with respect to the axis of the pump which produces a unit which is very versatile in its operation and adaptation.

Other changes and variations in the design, construction, and the combination of parts of this iiuid displacement device are contemplated. Therefore, the invention is not to be limited to the exact disclosure and description presented excepting insofar as the same shall be limited by the appended claims.

What I claim is:

1. In a device of the class described, a casing having side walls, a plurality of spiral blades extending inwardly from one side wall, a disk adjacent the other side wall, spiral blades carried by said disk in operative relation with the first mentioned blades, the blades on said disk having bearing sleeves at their inner terminals, elongated eccentrics extending through said sleeves, shafts journalled in said casing and carrying said eccentrics and means for operating said shafts.

2. In a device of the class described, a casing having side Walls, a plurality of spiral blades extending rom one of said side Walls, a disk adjacent the other side wall, a plurality of spiral blades carried by said disk in operative relation with said first mentioned blades, the blades on said disk having integral bearing sleeves upon their inner terminals, eccentrics journalled in said sleeves shafts extending through said oasing and carrying said eccentrics and counter- Weights upon said shafts adjacent the sides ofV said spiral blades and means for operating said Shafts.'

3,: :In a device of the class described,`a casingv having side walls, a plurality of spiral blades eX- tending from one side Wall, a free disk adjacent the other side Wall, a plurality of spiral blades carried by said disk in operative relation with the rst mentioned blades, the blades on said disk having sleeve bearings upon their inner terminals, shafts journalled in said casing and hav ing eccentrics journalled in said sleevebearings, oounterweights on said shafts adjacent said 4 spiral blades, counterbalanced gears carried by said shafts and a common gear for operating said gears.

JOHN MIKU'LASEK.

REFERENCES CITED The following references are of record in the le of this patent:

1() UNITED STATES PATENTS Number Name Date 385,832 Allyn July 10, 1888 801,182 Creux Oct. 3, 1905 1,679,592 Williams Aug. 7, 1928 l5 1,780,109 Berglund Oct. 28, 1930 31,929,998 Wilson Oct. 10, 1933 FOREIGN PATENTS Number Country Date 20 35,300 Denmark 1925 129,104 Austria July 11, 1932 V220,296 Great Britain Jan. 8, 1925y 310,763 Great Britain 1929' 367,086 Great Britain Feb. i8,- 1932r 25 380,344 Great Britain Sept. 15, 1932 427,656 France vJune 1, 1911 444,612 Great Britain Mar. 24, 1936 522,609 France Apr. 2, 1921 642,074 Germany 1937" 30 

